ENGINE AR 1303360 - Caterpillar

Illustration 1 g01023410
Typical circuit with EMCP IITest Step 1. Check for Connector Damage.
Turn the ECS to the OFF/RESET position.
Turn the battery disconnect switch to the OFF position.
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the other connectors. Refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion or of pinch points.Results:
OK - The connectors and wiring are okay. Proceed to Test Step 2.
Not OK - The connectors and/or wiring are not okay.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Stop.Test Step 2. Check the ON Status of the Emergency Stop Switch.
Turn the circuit breaker for the battery to the ON position.
Connect Cat ET.
Turn the ECS to the STOP position.
Activate the emergency stop switch.
Observe the status of the emergency stop switch on Cat ET.Expected Result:The parameter for the emergency stop switch reads "ON".Results:
OK - The emergency stop switch is working correctly. Proceed to Test Step 3.
Not OK - The parameter for the emergency stop switch does not display "ON". Proceed to Test Step 4.Test Step 3. Check the OFF Status of the Emergency Stop Switch.
Deactivate the emergency stop switch.Expected Result:The parameter for the emergency stop switch reads "OFF".Results:
OK - The emergency stop switch is functioning correctly.Repair: The problem may be intermittent. If the problem is intermittent, refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors". Stop.
NOT OK - The parameter for the emergency stop switch does not display "OFF". Proceed to Test Step 4.Test Step 4. Test the ECM.
Turn the ECS to the OFF/RESET position.
Turn the battery disconnect switch to the OFF position.
Connect Cat ET to the service tool connector J60/P60.
Disconnect the ECM connector J1/P1.
Remove the following wires from ECM connector P1. Install a wire jumper for each of the following wires that are removed.
P1-02 wire F719-BR.
P1-24 wire F715-PU.
Reconnect ECM connector J1/P1.
Locate a suitable jumper wire.
Connect the wire jumpers in P1-02 and P1-24 to the -Battery.
Turn the battery disconnect switch to the ON position.
Turn the ECS to the STOP position.
Observe the parameters for the emergency stop on Cat ET.
Turn the ECS to the OFF/RESET position.
Turn the battery disconnect switch to the OFF position.
Remove the wire jumpers. Replace all wires.Expected Result:The parameter for the emergency stop switch displays "OFF" when the jumper is installed. The parameter for the emergency stop switch displays "ON" when the jumper is removed.Results:
OK - The problem is not with the ECM. Proceed to Test Step 5.
Not OK - The parameter on the ECM is